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-rw-r--r--src/liblzma/Makefile.am6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/liblzma/Makefile.am b/src/liblzma/Makefile.am
index 8b3a678b..6e38cb65 100644
--- a/src/liblzma/Makefile.am
+++ b/src/liblzma/Makefile.am
@@ -72,11 +72,15 @@ endif
# static liblzma, we overwrite the static object file with an object file
# compiled from empty input. Note that GNU-specific features are OK here,
# because on Windows we are compiled with the GNU toolchain.
+#
+# The typedef in empty.c will prevent an empty translation unit, which is
+# not allowed by the C standard. It results in a warning with
+# -Wempty-translation-unit with Clang or -pedantic for GCC.
.rc.lo:
$(LIBTOOL) --mode=compile $(RC) $(DEFS) $(DEFAULT_INCLUDES) \
$(INCLUDES) $(liblzma_la_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) \
-i $< -o $@
- echo > empty.c
+ echo "typedef void empty;" > empty.c
$(COMPILE) -c empty.c -o $(*D)/$(*F).o
# Remove ordinals from the generated .def file. People must link by name,